package com.imm.controller;

import com.imm.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.basePath}")
    private String basePath;

    @PostMapping("/upload")
    public Result<String> upload(MultipartFile file) {

        // 获取文件后缀
        String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
        String fileName = UUID.randomUUID() + suffix;
        String url = basePath + fileName;
        log.info("url:{}", url);
        // 创建一个目录对象
        File dir = new File(basePath);
        // 判断存不存在
        if (!dir.exists()) {
            dir.mkdirs();
        }
        try {
            file.transferTo(new File(url));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return Result.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        try (FileInputStream fileInputStream = new FileInputStream(basePath + name);
             ServletOutputStream outputStream = response.getOutputStream()){

            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1) {
                outputStream.write(bytes, 0, len);
                outputStream.flush();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
